Infinity KAPPA PERFECT 12.1 vp

12" · 8 Ω · 250 W · 89.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	23.3 Hz
Qts	0.44
Qes	0.46
Qms	10.28
Vas	100 L
Sd	531 cm²
Xmax	7.1 mm
Re	4 Ω
Bl	15.3 T·m
Mms	184.2 g
Pe	250 W
Sensitivity	89.4 dB

Alignment hint

EBP	51 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 63.2 L

EBP 50-100: works in either a sealed or ported alignment.

Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.

Substitute candidates

Driver	Fs (Hz)	Qts	Vas (L)	Xmax (mm)	Sens (dB)	Fit	Notes	Compare
CSS Audio TRIO12 vp	22 -1.3	0.429 -0.01	97 -3	10 +2.9	88.5 -0.9	close		+
JBL GT 120	24.8 +1.5	0.429 -0.01	91.1 -8.9	8.1 +1	90.3 +0.9	close	4 Ω vs 8 Ω: amp load changes	+
JBL GT 120MKII	24.8 +1.5	0.429 -0.01	91.1 -8.9	8.1 +1	90.3 +0.9	close	4 Ω vs 8 Ω: amp load changes	+
JBL GT4-12	24.8 +1.5	0.429 -0.01	91.1 -8.9	8.1 +1	90.3 +0.9	close	4 Ω vs 8 Ω: amp load changes	+
Infinity KAPPA PERFECT 12.1	23.32 +0.02	0.44 =	99.97 -0.03	14.15 +7.05	86.2 -3.2	close	4 Ω vs 8 Ω: amp load changes	+
JL Audio 13W6V2-D4	24.3 +1	0.434 -0.01	111.6 +11.6	10.6 +3.5	88.3 -1.1	close		+
Blaupunkt VCS 1200	23 -0.3	0.487 +0.05	102 +2	13 +5.9	89.9 +0.5	close	4 Ω vs 8 Ω: amp load changes	+
Ground Zero GZTW 30	25 +1.7	0.44 =	110 +10	11.2 +4.1	90.7 +1.3	close	4 Ω vs 8 Ω: amp load changes	+
JBL CS1204	24.8 +1.5	0.429 -0.01	91.1 -8.9	6.3 -0.8	90.3 +0.9	close	4 Ω vs 8 Ω: amp load changes · Xmax 6.3 mm < 7.1 mm: lower excursion-limited SPL	+
JL Audio 12W1V2-8	24.98 +1.68	0.458 +0.02	100.15 +0.15	9.5 +2.4	86.8 -2.6	close		+

Compare the closest 3 against the KAPPA PERFECT 12.1 vp →

Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.

Used in enclosures (0)

No enclosure in the catalog uses this driver yet.